package com.qingfeng.configure;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping;
import springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider;

import java.lang.reflect.Field;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @ProjectName SwaggerBeanPostProcessor
 * @author Administrator
 * @version 1.0.0
 * @Description swagger 在 springboot 2.6.x+ 不兼容问题的处理
 * @createTime 2022/7/26 0026 11:39
 */
@Component
public class SwaggerBeanPostProcessor implements BeanPostProcessor
{
//    @Override
//    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException
//    {
//        if (bean instanceof WebMvcRequestHandlerProvider)
//        {
//            customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
//        }
//        return bean;
//    }

//    private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings)
//    {
//        List<T> copy = mappings.stream().filter(mapping -> mapping.getPatternParser() == null)
//                .collect(Collectors.toList());
//        mappings.clear();
//        mappings.addAll(copy);
//    }

    @SuppressWarnings("unchecked")
    private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean)
    {
        try
        {
            Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
            field.setAccessible(true);
            return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
        }
        catch (IllegalArgumentException | IllegalAccessException e)
        {
            throw new IllegalStateException(e);
        }
    }
}